/*
 * Copyright:  2018 smarabbit studio.
 *
 *  Licensed under the Confluent Community License; you may not use this file
 *  except in compliance with the License.  You may obtain a copy of the License at
 *
 *  http://www.confluent.io/confluent-community-license
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations under the License.
 *
 *  @作   者： 黄开晖 (117227773@qq.com)
 *  @日   期:  2019年1月7日
 */
package com.massyframework.beanskin.runtime.service.pagemapping;

import java.util.Objects;

import com.massyframework.beanskin.framework.FrameworkEventAdapter;
import com.massyframework.beanskin.framework.FrameworkStartingEvent;
import com.massyframework.beanskin.framework.FrameworkStoppedEvent;
import com.massyframework.beanskin.web.mapping.PageMappingRepository;

/**
 * {@link PageMappingFounderRegister}，在Framework启停之间，注册和注销页面映射发现器服务
 */
public class PageMappingFounderRegister extends FrameworkEventAdapter {
	
	private final PageMappingRepository repository;
	private PageMappingFounder founder;

	/**
	 * 构造方法
	 * @param repository {@link PageMappingRepository}
	 */
	public PageMappingFounderRegister(PageMappingRepository repository) {
		this.repository = 
			Objects.requireNonNull(repository, "\"repository\" cannot be null.");
	}
	

	@Override
	public void onEvent(FrameworkStartingEvent event) {
		if (this.founder == null) {			
			this.founder = new PageMappingFounder(repository);
			event.getFramework().addListener(this.founder);
		}
	}

	@Override
	public void onEvent(FrameworkStoppedEvent event) {
		if (this.founder != null) {
			event.getFramework().removeListener(this.founder);
			this.founder = null;
		}
	}
}
